Fireworks aren't the only light trails to photograph; it's fun to work indoors leaving the shutter open for a few seconds, moving the camera or the lights around, sometimes zooming in or out to make it more interesting!

Two photos below: A small handheld fan with colour-changing LED lights set into the blades

Below: moving a ball with set-in colour-changing LEDs

Below: the weird effect of focusing on a neighbour's house, and a plant decorated with fairy lights, whilst zooming out!